Smart Roadster, 452
Coolant capacity & service interval
Smart Roadster 452 uses coolant with a capacity of 4,2 liters. Service intervals occur every 250000 km or 180 months. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| roadster (45 kW) (2003-2006) |
|
| roadster (60 kW) (2003-2006) |
|
| roadster Brabus (74 kW) (2003-2006) |
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Additional Notes
- All three engine variants of the Smart Roadster 452 share an identical cooling system capacity of 4.2 liters, covering the 45 kW, 60 kW, and Brabus 74 kW configurations across the 2003-2006 production span.
- The 4.2-liter figure represents the total cooling system fill volume, which accounts for the coolant held across the radiator, engine block passages, hoses, and expansion reservoir combined.
- The change interval for all three variants is rated at 250,000 km or 180 months under normal use conditions, with 180 months equating to a 15-year service life between coolant replacements.
- A 250,000 km drain interval places the Smart Roadster 452 coolant specification in the long-life category, which is typically associated with modern ethylene glycol formulations engineered to resist silicate depletion and corrosion inhibitor breakdown over extended periods.
- The normal use condition tied to the 250,000 km / 180-month interval applies uniformly across the 45 kW, 60 kW, and Brabus 74 kW engine outputs, with no differentiated interval recorded for the higher-output Brabus variant despite its increased thermal load.
- The 180-month time limit functions as a calendar-based ceiling independent of mileage accumulation, meaning low-mileage examples of the Smart Roadster 452 would still reach a service point after 15 years regardless of distance traveled.